- A Salmonella, a bacterium causing typhoid
- B Entamoeba histolytica
- C Plasmodium, the parasite causing malaria
- D Ascaris, a roundworm causing intestinal infection
Correct answer: B. Entamoeba histolytica
Explanation: Amoebiasis is caused by Entamoeba histolytica, a protozoan. It infects the large intestine, causing diarrhoea with blood and mucus. It spreads through contaminated food and water. Treatment: metronidazole.
Concept context
Pathogens, infectious diseases, non-infectious diseases, drugs, cancer, and public health. High NEET importance.